diff options
| author | Benjamin Gaignard | 2017-01-04 10:12:57 +0100 |
|---|---|---|
| committer | Daniel Vetter | 2017-01-06 11:04:54 +0100 |
| commit | 62a0d98a188cc4ebd8ea54b37d274ec20465e464 (patch) | |
| tree | bb649f5cc408727179380fce600adeba99b2ebbd /include/drm/drm_gem_cma_helper.h | |
| parent | drm: compile drm_vm.c only when needed (diff) | |
| download | kernel-qcow2-linux-62a0d98a188cc4ebd8ea54b37d274ec20465e464.tar.gz kernel-qcow2-linux-62a0d98a188cc4ebd8ea54b37d274ec20465e464.tar.xz kernel-qcow2-linux-62a0d98a188cc4ebd8ea54b37d274ec20465e464.zip | |
drm: allow to use mmuless SoC
Some SoC without MMU have display driver where a drm/kms driver
could be implemented.
Before doing such kind of thing drm/kms must allow to use mmuless devices.
This patch propose to remove MMU configuration flag and add a cma helper
function to help implementing mmuless display driver
version 4:
- add documentation about drm_gem_cma_get_unmapped_area()
- stub it MMU case
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
[danvet: Use recommended struct member references in kernel-doc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1483521177-21794-4-git-send-email-benjamin.gaignard@linaro.org
Diffstat (limited to 'include/drm/drm_gem_cma_helper.h')
| -rw-r--r-- | include/drm/drm_gem_cma_helper.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h index acd6af8a8e67..2abcd5190cc1 100644 --- a/include/drm/drm_gem_cma_helper.h +++ b/include/drm/drm_gem_cma_helper.h @@ -53,6 +53,23 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, extern const struct vm_operations_struct drm_gem_cma_vm_ops; +#ifndef CONFIG_MMU +unsigned long drm_gem_cma_get_unmapped_area(struct file *filp, + unsigned long addr, + unsigned long len, + unsigned long pgoff, + unsigned long flags); +#else +static inline unsigned long drm_gem_cma_get_unmapped_area(struct file *filp, + unsigned long addr, + unsigned long len, + unsigned long pgoff, + unsigned long flags) +{ + return -EINVAL; +} +#endif + #ifdef CONFIG_DEBUG_FS void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m); #endif |